{"id":6730,"date":"2013-01-23T19:39:49","date_gmt":"2013-01-23T10:39:49","guid":{"rendered":"http:\/\/vitalify.jp\/blog\/?p=6730"},"modified":"2013-01-23T19:39:49","modified_gmt":"2013-01-23T10:39:49","slug":"webglhtml5%e3%81%a73dcg%e3%82%92%e5%8b%89%e5%bc%b7%e3%81%97%e3%81%a6%e3%81%bf%e3%81%9f%ef%bc%81-part4","status":"publish","type":"post","link":"https:\/\/vitalify.jp\/blog\/2013\/01\/webglhtml5%e3%81%a73dcg%e3%82%92%e5%8b%89%e5%bc%b7%e3%81%97%e3%81%a6%e3%81%bf%e3%81%9f%ef%bc%81-part4.html","title":{"rendered":"WebGL+HTML5\u30673DCG\u3092\u52c9\u5f37\u3057\u3066\u307f\u305f\uff01 Part4"},"content":{"rendered":"

\u3069\u3046\u3082\u3002\u55b6\u696d\u90e8\u306e\u4f0a\u85e4\u3067\u3059\u3002<\/p>\n

\u5f53\u30b7\u30ea\u30fc\u30ba\u3082\u4eca\u56de\u3067\u6700\u5f8c\u3067\u3059\uff01\uff01\uff01
\n\u304b\u306a\u308a\u9593\u304c\u3042\u304d\u307e\u3057\u305f\u304c\u3001\u3001\u3001\u3061\u3083\u3093\u3068\u66f8\u304d\u307e\u3059\u3002<\/p>\n

\u524d\u56de\u306e\u30d6\u30ed\u30b0<\/a>\u3067STEP4\u306e\u300c\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u3092\u7528\u610f\u300d\u3068STEP5\u306e\u300c\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u304b\u3089VBO(VertexBufferObject)\u3092\u751f\u6210\uff06\u30d0\u30a4\u30f3\u30c9\u300d\u307e\u3067\u66f8\u304d\u307e\u3057\u305f\u306e\u3067\u3001\u4eca\u56de\u306f3DCG\u63cf\u753b\u306e\u4ed5\u4e0a\u3052\u3067\u3042\u308b
\nSTEP6\u300c\u5ea7\u6a19\u5909\u63db\u884c\u5217\u3092\u751f\u6210\uff06\u901a\u77e5\u300d
\nSTEP7\u300c\u63cf\u753b\u547d\u4ee4\u300d
\nSTEP8\u300cSTEP6\uff5e7\u306e\u518d\u5e30\u51e6\u7406(canvas\u3092\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0)\u300d
\n\u3092\u66f8\u304d\u307e\u3059\u3002<\/p>\n

\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u304b\u3089VBO(VertexBufferObject)\u306e\u751f\u6210\uff06\u30d0\u30a4\u30f3\u30c9\u307e\u3067\u7d42\u308f\u308a\u307e\u3057\u305f\u306e\u3067\u3001\u6700\u5f8c\u306b\u4e09\u6b21\u5143\u3092\u4e8c\u6b21\u5143\u306b\u5909\u63db\u3057\u3066\u307f\u3088\u3046\u3068\u601d\u3044\u307e\u3059\u3002
\n\u901a\u5e38\u4eba\u9593\u304c\u898b\u3066\u3044\u308b\u7269\u4f53\u306f\u4e09\u6b21\u5143\u7a7a\u9593\u306b\u5b58\u5728\u3057\u307e\u3059\u306e\u3067\u3001\u5168\u3066\u306e\u3082\u306e\u306b\u7e26\u3068\u6a2a\u3068\u5965\u884c\u304d\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30e2\u30cb\u30bf\u30fc\u4e0a\u3067\u306f\u4e09\u6b21\u5143\u60c5\u5831\u3092\u51fa\u529b\u3067\u304d\u306a\u3044(\u5b9f\u969b\u306b\u306f\u51fa\u529b\u3067\u304d\u308b\u3082\u306e\u3082\u3042\u308a\u307e\u3059)\u306e\u3067\u3001\u30b7\u30e5\u30df\u30ec\u30fc\u30b7\u30e7\u30f3\u3057\u305f\u30e2\u30c7\u30eb\u30c7\u30fc\u30bf\u3092\u64ec\u4f3c\u7684\u306b\u4e09\u6b21\u5143\u306b\u5909\u63db\u3057\u3066\u8868\u793a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u3053\u3053\u3067\u5fc5\u8981\u3068\u306a\u308b\u60c5\u5831\u3001\u8a08\u7b97\u304c\u300c\u5ea7\u6a19\u5909\u63db\u884c\u5217\u300d\u3067\u3059\u3002
\n\u3053\u306e\u884c\u5217\u306b\u306f\u300c\u30e2\u30c7\u30eb\u5909\u63db(\u30ef\u30fc\u30eb\u30c9\u5909\u63db)\u300d\u3001\u300c\u30d3\u30e5\u30fc\u5909\u63db\u300d\u3001\u300c\u30d7\u30ed\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u5909\u63db\u300d\u3068\u8a083\u7a2e\u985e\u3042\u308a\u3001\u3053\u308c\u3089\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u8a08\u7b97\u3059\u308b\u3053\u3068\u3067\u64ec\u4f3c\u7684\u306b\u4e09\u6b21\u5143\u3092\u4e8c\u6b21\u5143\u7a7a\u9593\u3067\u518d\u73fe\u3059\u308b\u4e8b\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u305d\u308c\u305e\u308c\u306e\u5909\u63db\u5b9a\u7fa9\u3092\u79c1\u306a\u308a\u306b\u8a8d\u8b58\u3067\u7c21\u5358\u306b\u66f8\u304f\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u25cb\u30e2\u30c7\u30eb\u5909\u63db
\n\u7269\u4f53\u304c\u5b58\u5728\u3059\u308b\u305f\u3081\u306b\u306f\u57fa\u6e96\u3068\u306a\u308b\u539f\u70b9\u304c\u3042\u308a\u3001\u307e\u305f\u305d\u308c\u304c\u76f8\u5bfe\u7684\u306b\u3069\u3053\u306b\u3042\u308b\u304b\u3068\u3044\u3046\u4f4d\u7f6e\u3092\u5b9a\u7fa9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u7a7a\u9593\u3001\u307e\u305f\u7269\u4f53\u306e\u76f8\u5bfe\u7684\u4f4d\u7f6e\u3092\u5b9a\u7fa9\u3059\u308b\u306e\u304c\u30e2\u30c7\u30eb\u5909\u63db\u3067\u3059\u3002<\/p>\n

\u25cb\u30d3\u30e5\u30fc\u5909\u63db
\n\u5f53\u305f\u308a\u524d\u3067\u306f\u3042\u308a\u307e\u3059\u304c\u3001\u7269\u4f53\u3092\u898b\u308b\u70ba\u306b\u306f\u300c\u76ee\u300d\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002
\n\u30d3\u30e5\u30fc\u5909\u63db\u306f\u305d\u306e\u300c\u76ee\u300d\u304c\u3069\u306e\u4f4d\u7f6e\u306b\u3042\u308b\u306e\u304b\u3001\u307e\u305f\u3069\u3053\u3092\u5411\u3044\u3066\u3044\u308b\u306e\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n

\u25cb\u30d7\u30ed\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u5909\u63db
\n\u6700\u5f8c\u306b\u3001\u30d3\u30e5\u30fc\u5909\u63db\u3067\u5b9a\u7fa9\u3057\u305f\u300c\u76ee\u300d\u304c\u3069\u3053\u307e\u3067\u898b\u3048\u308b\u306e\u304b\u3001\u3069\u3053\u307e\u3067\u898b\u308b\u306e\u304b\u3082\u5b9a\u7fa9\u304c\u5fc5\u8981\u3067\u3059\u3002
\n\u4eba\u9593\u306e\u76ee\u306b\u3082\u8996\u91ce\u3001\u8996\u529b\u304c\u3042\u308b\u3088\u3046\u306b\u3001\u4e09\u6b21\u5143\u3092\u63cf\u753b\u3059\u308b\u969b\u306b\u3082\u3069\u306e\u9818\u57df\u3092\u8868\u793a\u3059\u308b\u306e\u304b\u3001\u3069\u3053\u307e\u3067(\u8ddd\u96e2)\u8868\u793a\u3059\u308b\u306e\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u306e\u304c\u30d7\u30ed\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u5909\u63db\u3067\u3059\u3002<\/p>\n

\u30d3\u30e5\u30fc\u5909\u63db\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u5909\u63db\u7528\u306e\u914d\u5217\u3001\u8a08\u7b97\u306b\u306fPart1<\/a>\u3067\u7d39\u4ecb\u3057\u305f\u300cglMatrix.js\u300d\u3092\u5229\u7528\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002<\/p>\n

STEP6\uff5eSTEP8\u306e\u4e00\u9023\u306e\u51e6\u7406\u3092\u5b9f\u884c\u3057\u3066\u3044\u308bdrawObject(Function)\u3067\u8a72\u5f53\u90e8\u5206\u3092\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\nrequestAnimFrame(drawObject);
\ngl.viewport(0, 0, canvas.width, canvas.height);\n<\/div>\n

\u307e\u305a\u306frequestAnimFrame\u30673DCG\u63cf\u753b\u51e6\u7406\u306e\u518d\u5e30(\u30eb\u30fc\u30d7)\u3092\u547d\u4ee4\u3057\u3066\u3044\u307e\u3059\u3002
\n\u3053\u3061\u3089\u3082webgl-util\u3068\u3044\u3046\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5229\u7528\u3057\u3066\u3044\u307e\u3059\u3002
\n\u305d\u306e\u5f8c\u3001viewport\u3067WebGL\u306b\u4e09\u6b21\u5143\u7a7a\u9593\u3092\u8868\u793a\u3059\u308b\u9818\u57df\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n

\nvar rad = (count % 360) * Math.PI \/ 180;
\nvar x = Math.cos(rad);
\nvar y = Math.sin(rad);
\nvar mod = count % 4;
\nvar s = Math.sin(rad) + 1.0;
\nvar timeNow = new Date().getTime();
\nif (lastTime != 0) {
\n var elapsed = timeNow – lastTime;
\n rotate += (90 * elapsed) \/ 1000.0;
\n}
\nlastTime = timeNow;
\ncount++;<\/p>\n

mat4.identity(matrixMove);
\nmat4.translate(matrixMove, [x, y, -7.0]);
\nmat4.scale(matrixMove, [s, s, 0.0], matrixMove);
\nmat4.rotate(matrixMove, rotate * Math.PI \/ 100, [0, 1, 1]);
\nvertexMatrix2 = gl.getUniformLocation(shaderProgram, “vertexMatrix2”);
\ngl.uniformMatrix4fv(vertexMatrix2, false, matrixMove);\n<\/p><\/div>\n

\u30e2\u30c7\u30eb\u5909\u63db\u3067\u5f27\u3092\u63cf\u3044\u305f\u308a\u3001\u524d\u5f8c\u306b\u79fb\u52d5\u3055\u305b\u305f\u308a\u3059\u308b\u305f\u3081\u306e\u5404\u7a2e\u8a08\u7b97\u51e6\u7406\u3092\u5b9f\u65bd\u5f8c\u3001\u30b7\u30a7\u30fc\u30c0\u5074\u306b\u5024\u3092\u53d7\u3051\u6e21\u3057\u307e\u3059\u3002
\nx\u3001y\u304c\u5ea7\u6a19\u7528\u3001mod\u304c\u77ac\u304d\u7528\u3001s\u304c\u5927\u304d\u3055\u3001rotate\u304c\u56de\u8ee2\u306e\u5024\u3067\u3059\u3002<\/p>\n

\nmat4.perspective(75, canvas.width \/ canvas.height, mod, 90, matrixPerspective);
\nvertexMatrix1 = gl.getUniformLocation(shaderProgram, “vertexMatrix1”);
\ngl.uniformMatrix4fv(vertexMatrix1, false, matrixPerspective);\n<\/div>\n

\u6b21\u306b\u30d7\u30ed\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u5909\u63db\u7528\u306b\u3069\u306e\u9818\u57df\u3092\u8868\u793a\u3059\u308b\u306e\u304b\u3001\u3069\u3053\u307e\u3067(\u8ddd\u96e2)\u8868\u793a\u3059\u308b\u306e\u304b\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002
\n\u63cf\u753b\u30b7\u30fc\u30f3\u306e\u8996\u91ce\u89d2\u3084\u8868\u793a\u9818\u57df\u306e\u6a2a\u5e45\u3068\u9ad8\u3055\u306e\u6bd4\u3001\u8996\u529b(\u975e\u8868\u793a\u3068\u3059\u308b\u8ddd\u96e2)\u3092\u8a2d\u5b9a\u5f8c\u3001\u30b7\u30a7\u30fc\u30c0\u5074\u306b\u5024\u3092\u53d7\u3051\u6e21\u3057\u307e\u3059\u3002
\n\u3053\u3053\u3067\u7279\u6b8a\u306a\u306e\u304c\u3001mod\u306e\u90e8\u5206\u3067\u3059\u3002\u672c\u6765\u3067\u3042\u308c\u3070\u3053\u308c\u3088\u308a\u8fd1\u3065\u3044\u305f\u3089\u8868\u793a\u3057\u306a\u3044\u8ddd\u96e2\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u56fa\u5b9a\u5024\u306b\u306a\u308b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u4eca\u56de\u306f(\u76ee\u306e)\u77ac\u304d\u3092\u60f3\u5b9a\u3057\u3066\u5b9a\u671f\u7684\u306b\u8996\u91ce\u3092\u7121\u304f\u3059\u305f\u3081mod\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\nvar vertexPosition = gl.getAttribLocation(shaderProgram, “vertexPosition”);
\ngl.bindBuffer(gl.ARRAY_BUFFER, vboPosition);
\ngl.enableVertexAttribArray(vertexPosition);
\ngl.vertexAttribPointer(vertexPosition, 3, gl.FLOAT, false, 0, 0);<\/p>\n

vertexTexture = gl.getAttribLocation(shaderProgram, “vertexTexture”);
\ngl.bindBuffer(gl.ARRAY_BUFFER, vboSurface);
\ngl.enableVertexAttribArray(vertexTexture);
\ngl.vertexAttribPointer(vertexTexture, 2, gl.FLOAT, false, 0, 0);
\ngl.activeTexture(gl.TEXTURE0);
\ngl.bindTexture(gl.TEXTURE_2D, cubeTexture);<\/p>\n

gl.drawElements(gl.TRIANGLES, 36, gl.UNSIGNED_SHORT, 0);\n<\/p><\/div>\n

\u6700\u5f8c\u306b\u3001STEP3\u3067\u7528\u610f\u3057\u3066\u3044\u305f\u7269\u4f53\u81ea\u4f53\u306e\u5ea7\u6a19\u60c5\u5831\u3001\u30c6\u30af\u30b9\u30c1\u30e3\u5ea7\u6a19\u306a\u3069\u3092\u30b7\u30a7\u30fc\u30c0\u5074\u306b\u53d7\u3051\u6e21\u3057\u3001\u63cf\u753b(drawElements)\u3057\u307e\u3059\u3002
\n\u3053\u3053\u307e\u3067\u306e\u4e00\u9023\u306e\u6d41\u308c(drawObject)\u3092\u518d\u5e30\u7684\u306b\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u4e09\u6b21\u5143\u7a7a\u9593\u3092\u8868\u73fe\u3057\u3001\u4e14\u3064\u52d5\u304d\u3092\u8868\u73fe\u3057\u307e\u3059\u3002<\/p>\n

Part1\u306e\u6295\u7a3f\u304b\u3089\u3061\u3087\u3046\u30692\u30f6\u6708\u304c\u7d4c\u3061\u307e\u3057\u305f\u304c\u3001\u7c21\u5358\u306aWebGL\u306e\u5b9f\u88c5\u306b\u3064\u3044\u3066\u306f\u4ee5\u4e0a\u3067\u3059\u3002
\n\u6b63\u76f4\u306a\u3068\u3053\u308d\u3001\u8272\u3005\u3068\u5fd8\u308c\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u306e\u3067\u2026\u3053\u308c\u304b\u3089\u3082\u5b9a\u671f\u7684\u306b\u5fa9\u7fd2\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3057\u3088\u3046\u3068\u601d\u3044\u307e\u3059\u3002
\n\u307e\u305f\u6c17\u304c\u5411\u3044\u305f\u3089\u4e09\u6b21\u5143POST\u3057\u307e\u3059\uff01<\/p>\n

\u3067\u306f\u3067\u306f\u3002<\/p>\n

\n
<\/div><\/fb:like><\/div>\n
<\/g:plusone><\/div>\n
\"\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0\"<\/a>